Something quite bad has happened to the networking and/or power of our building at the university, but I'm not going to magically fix it by staying up to stare desperately at things and refresh the only status page I have access to¹.
¹ the university's wifi network activity map, which shows university wireless usage going abruptly from 40 devices to 4 around 00:13 or so, which is when everything of ours went poof off the network.